So ideally you want to have the best atomizaiton of injectant as possible, might not be as large of an issue for meth guys as meth will tend to vaporize at lower temps. For water it's different though.

I read that one user had 2 nozzles in the silicone coupler.
I wanted to know if I put the nozzle on the elbow, would injecting into the air flow be better, or would injecting with the flow be better, (so towards IC or into throttle body)

Second question, single M5 nozzle, or dual M3 nozzles. Both PWM controlled. Ideally, shouldnt make a difference as the pressure they see will be the same, but any real world ideas?

 

I prefer multiple smaller nozzles to a single larger one since they see the same pressure smaller ones atomize better

 

i would like to know exacly where to mount it aswell.

 

Theoretically It would be best to mount the nozzle as far upstream as possible (without getting into the IC) so the spray would have the most time to atomize. I also agree that multiple, smaller, nozzles would probably be better than a single larger one in terms of mist/spray pattern and atomizing.

I've always had my nozzle located right after the IC.

 

Ive heard as close to the intake port as possible (often just before the throttle body) , in hopes that you get most of the evaporation in the combustion chamber.

 

and some do pre-turbo... I'm doing both pre-turbo and pre-throttle

 

mee too

 

whats the benifit from having it pre turbo? i asked coolingmist and they said they really dont recommend it. that you should let the i/c do its job. so the places that you could possible put it... right after the i/c, middle of the i/c pipe, or top part of the i/c pipeing/elbow...

 

my AITs are 20-30 *F below ambient... can your intercooler do that?

EDIT**
If you are infecting after the turbine, it's more of a knock deterrent. yes you will see some cooling of AITs, but EGTs is where you will see the benifit.

with my set up, I am drastically cooling AITs and EGTs.

 

A preturbo spray will cool the charge before it gets to the engine the liquid, is vaporized at the hot turbo and hot intake charge. I think they are spraying water as I methanol might get to flash point, but I'm not sure on that. If you spray pre intake, the mist will be heated in the combustion process, either cooling in the case of water, or combusting and cooling in the case of methanol. This results in cooler EGT's as stated earlier.

 

The water is atomized by the nozzle.

Wouldn't lengthening the distance the water travels by placing it farther from the throttle body make it more likely coalesce back in to larger drops by collecting on the sides of IC pipes and fittings?

 

You're talking 60+ mph air speed in a suitably designed intake tract. There's very little chance of stagnant air flow allowing coalescence of the hopefully nicely atomized water droplets on anything.

 

You're probably right.

Also, I just recalled that my intake temp sensor is relocated to the elbow - I probably don't want to spray water directly onto it.

 

Well since pmrob put it that way, i think I might put it on my intake elbow. Now, I also assume 2 small nozzles aren't better than one larger one?

 

Theoretically you want to water to change state from liquid to gas "changing phase" - water is an interesting compound in that it absorbs a huge amount of heat when changing phase. Heat transfer (cooling the charge) is facilitated by increasing the surface area of the liquid relative to it's volume. Very fine droplets of water provide a large surface area. That's some of the physics behind the charge cooling effect. The finer the atomization, the more efficient the process will be.

 

donz, make sure the jet is a good distance from your AIT sensor... if the mix hasn't atomized, you'll get a false reading at the sensor.

 

Thanks Guys...
Hey I've been looking at some nozzles and i don't know what's going to work.
I currently have the cooling mist nozzles and while thin they will work, I think there are better (more expensive) things out there.
Here are thing I am considering
1) a nitrous nozzle, should work but I can't find what operating pressures it uses
2) use a "fogger nozzle" some can make a fine mist which can float in air>> may need around 150psi, High speed valves can't take the pressures, flow volumes might need 2 or more nozzles

This is after i saw a vid of a standard nozzle at 100 PSI, it's a nice spary, but definately not a mist or a fog, which I think would work amazing if it can be done in the intake manifold.

 

In the case of running stand alone, with an AIT sensor in the TB inlet, would it be better to have the nozzle fore or aft of the sensor?

I would imagine, if the AIT sensor doesn't see the lowered temp, you would also have a false reading, as opposed to being after and not reflecting the drop in temp from the mist/heat transfer?

Input?